What is the cheapest airline that flies from Ontario to Illinois?

United Airlines, Porter Airlines, and Air Canada are the most popular carriers operating from Ontario to Illinois

How many flights depart from Region of Ontario to Illinois on average per day?

As of April 2026, 94 flights take off from Region of Ontario and land in Illinois each day. The most common flight departure time for this route is 11:00a.m., with 42% of daily flights taking off at noon.

Which airlines fly to Illinois?

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Illinois from Region of Ontario according to our data. Air Canada is the first choice among our users, with 54% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Region of Ontario to Illinois on average per week?

658 flights are operational weekly from Region of Ontario to Illinois as of April 2026. The most popular departure day for this route is Thu, with 17% of flights per week taking off on this day.

How long is the flight from Region of Ontario to Illinois?

The average flight duration from Region of Ontario to Illinois depends on which airport you fly into and out of. Flying from Ottawa to Chicago O'Hare Intl Airport is 2h 08m on average, while flying from Toronto to Chicago O'Hare Intl Airport is 8h 15m on average. Chicago O'Hare Intl Airport is the most popular airport in Illinois.

When did momondo last update prices for flights from Ontario to Illinois?

Prices for flights from Ontario to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Ontario to Illinois?

There are 6 operators available for flights from Ontario to Illinois as of April 2026.

How old do you have to be to fly from Ontario to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

C$ 171 Cheap Flights from Ontario to Illinois in 2026

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Find the cheapest flights from Ontario to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:05 a.m. - 9:00 a.m.

YYZ

ORD

1h 55mdirect

8:45 a.m. - 4:10 p.m.

ORD

YYZ

6h 25m

1 stop

C$ 273Air Canada

ons, 1 jul - lör, 4 jul

9:00 p.m. - 10:01 p.m.

YYZ

ORD

2h 01mdirect

7:09 a.m. - 9:54 a.m.

ORD

YYZ

1h 45mdirect

C$ 274United Airlines

fre, 1 maj - lör, 2 maj

1:45 p.m. - 2:35 p.m.

YTZ

MDW

1h 50mdirect

3:20 p.m. - 6:00 p.m.

MDW

YTZ

1h 40mdirect

C$ 274Air Transat

ons, 6 maj - ons, 13 maj

8:05 a.m. - 9:00 a.m.

YYZ

ORD

1h 55mdirect

8:45 a.m. - 3:35 p.m.

ORD

YYZ

5h 50m

1 stop

C$ 275Air Canada

tis, 30 jun - lör, 4 jul

8:55 a.m. - 9:45 a.m.

YTZ

MDW

1h 50mdirect

10:30 a.m. - 1:10 p.m.

MDW

YTZ

1h 40mdirect

C$ 275Multiple Airlines

lör, 2 maj - tis, 5 maj

8:50 a.m. - 9:40 a.m.

YTZ

MDW

1h 50mdirect

3:20 p.m. - 6:00 p.m.

MDW

YTZ

1h 40mdirect

C$ 277Porter Airlines

tors, 18 jun - ons, 24 jun

10:05 a.m. - 11:00 a.m.

YTZ

ORD

1h 55mdirect

11:45 a.m. - 2:25 p.m.

ORD

YTZ

1h 40mdirect

C$ 277Porter Airlines

lör, 5 sep - tis, 8 sep

6:15 a.m. - 7:25 a.m.

YYZ

ORD

2h 10mdirect

1:19 p.m. - 10:30 p.m.

ORD

YYZ

8h 11m

1 stop

C$ 277American Airlines

lör, 16 maj - ons, 27 maj

1:45 p.m. - 2:35 p.m.

YTZ

MDW

1h 50mdirect

10:25 a.m. - 1:05 p.m.

MDW

YTZ

1h 40mdirect

C$ 278Air Transat

tors, 30 jul - lör, 1 aug

7:20 a.m. - 4:30 p.m.

YYZ

STL

10h 10m

1 stop

6:00 a.m. - 2:30 p.m.

STL

YYZ

7h 30m

1 stop

C$ 417American Airlines

ons, 27 maj - ons, 10 jun

Air Canada flights from Region of Ontario to Illinois

Our best Air Canada deals on Region of Ontario to Illinois flight tickets

Air Canada

1 Jul

YYZ8:05 a.m.Toronto Pearson Intl

1h 55m

ORD9:00 a.m.Chicago O'Hare Intl

4 Jul

ORD8:45 a.m.Chicago O'Hare Intl

6h 25m

1 stop

YYZ4:10 p.m.Toronto Pearson Intl

C$ 273

Air Canada

28 Aug

YTZ12:15 p.m.Toronto Island

1h 55m

ORD1:10 p.m.Chicago O'Hare Intl

30 Aug

ORD8:45 a.m.Chicago O'Hare Intl

6h 06m

1 stop

YTZ3:51 p.m.Toronto Island

C$ 275

Air Canada

2 May

YYZ4:00 p.m.Toronto Pearson Intl

5h 08m

1 stop

ORD8:08 p.m.Chicago O'Hare Intl

4 May

ORD3:50 p.m.Chicago O'Hare Intl

1h 43m

YYZ6:33 p.m.Toronto Pearson Intl

C$ 278

United Airlines flights from Region of Ontario to Illinois

Our best United Airlines deals on Region of Ontario to Illinois flight tickets

United Airlines

1 May

YYZ9:00 p.m.Toronto Pearson Intl

2h 01m

ORD10:01 p.m.Chicago O'Hare Intl

2 May

ORD7:09 a.m.Chicago O'Hare Intl

1h 45m

YYZ9:54 a.m.Toronto Pearson Intl

C$ 274

United Airlines

1 May

YYZ9:00 p.m.Toronto Pearson Intl

2h 01m

ORD10:01 p.m.Chicago O'Hare Intl

6 May

ORD5:00 a.m.Chicago O'Hare Intl

5h 43m

1 stop

YYZ11:43 a.m.Toronto Pearson Intl

C$ 288

United Airlines

17 Apr

YYZ7:43 p.m.Toronto Pearson Intl

5h 00m

1 stop

ORD11:43 p.m.Chicago O'Hare Intl

19 Apr

ORD12:52 p.m.Chicago O'Hare Intl

1h 54m

YYZ3:46 p.m.Toronto Pearson Intl

C$ 294

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

ons 1/7

8:05 a.m.-9:00 a.m.

Nonstop1h 55m

Chicago O'Hare Intl

lör 4/7

8:45 a.m.-4:10 p.m.

1 stop6h 25m

C$ 273

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

fre 1/5

9:00 p.m.-10:01 p.m.

Nonstop2h 01m

Chicago O'Hare Intl

lör 2/5

7:09 a.m.-9:54 a.m.

Nonstop1h 45m

C$ 274

Quickest round-trip

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

ons 6/5

1:45 p.m.-2:35 p.m.

Nonstop1h 50m

Chicago Midway

ons 13/5

3:20 p.m.-6:00 p.m.

Nonstop1h 40m

C$ 274

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

tis 30/6

8:05 a.m.-9:00 a.m.

Nonstop1h 55m

Chicago O'Hare Intl

lör 4/7

8:45 a.m.-3:35 p.m.

1 stop5h 50m

C$ 275

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

lör 2/5

8:55 a.m.-9:45 a.m.

Nonstop1h 50m

Chicago Midway

tis 5/5

10:30 a.m.-1:10 p.m.

Nonstop1h 40m

C$ 275

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

tors 18/6

8:50 a.m.-9:40 a.m.

Nonstop1h 50m

Chicago Midway

ons 24/6

3:20 p.m.-6:00 p.m.

Nonstop1h 40m

C$ 277

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

lör 5/9

10:05 a.m.-11:00 a.m.

Nonstop1h 55m

Chicago O'Hare Intl

tis 8/9

11:45 a.m.-2:25 p.m.

Nonstop1h 40m

C$ 277

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

lör 16/5

6:15 a.m.-7:25 a.m.

Nonstop2h 10m

Chicago O'Hare Intl

ons 27/5

1:19 p.m.-10:30 p.m.

1 stop8h 11m

C$ 277

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

tors 30/7

1:45 p.m.-2:35 p.m.

Nonstop1h 50m

Chicago Midway

lör 1/8

10:25 a.m.-1:05 p.m.

Nonstop1h 40m

C$ 278

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

ons 27/5

7:20 a.m.-4:30 p.m.

1 stop10h 10m

Lambert-St Louis

ons 10/6

6:00 a.m.-2:30 p.m.

1 stop7h 30m

C$ 417

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Region of Ontario to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

In general, July is the cheapest month to fly from Region of Ontario to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 298. If you don’t want to visit Illinois in July, then you should wait until June to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 309.

What is the cheapest day to depart on your flight to Illinois?

According to our data, Friday is the cheapest day to fly to Illinois from Region of Ontario. The lowest ticket price found for a Friday departure recently was C$ 701. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Tuesday, with ticket prices averaging around C$ 1,101.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Region of Ontario to Illinois during this time can be as low as C$ 722. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,149 on average. Flights to Illinois from Region of Ontario at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Ontario to Illinois flight route?

Fly from Toronto Island to Chicago Midway for the best Ontario - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 402 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Region of Ontario for as low as C$ 271 on momondo.

What cabin class options are available on Ontario to Illinois flights?

There are 4 cabin classes available to choose from on Ontario to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Illinois flights?

You could potentially save up to 4% on your flight if you consider stops on a Region of Ontario to Illinois flight.

Cheap Region of Ontario to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois

Best price found	C$ 264
Fastest flight time	1h 50m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Region of Ontario in the past 72 hours is C$ 264. The best round-trip flight deal from Region of Ontario to Illinois found on momondo in the last 72 hours is C$ 294.

The fastest flight from Region of Ontario to Illinois takes 1h 50m

Direct flights go from Region of Ontario to Illinois every day.

There are 98 airports in Illinois. From Region of Ontario there are direct flights to Chicago Midway (MDW).

Search flight deals

Frequently asked questions about flying from Ontario to Illinois

When did momondo last update prices for flights from Ontario to Illinois?
Prices for flights from Ontario to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Illinois?
There are 6 operators available for flights from Ontario to Illinois as of April 2026.
How old do you have to be to fly from Ontario to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Region of Ontario to Illinois is De Havilland (Bombardier) DHC-8-400 Dash 8Q, representing 15.39% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 13.49%, Embraer 175 at 10.27%, and Boeing 737 MAX 8 at 9.37%.

Best airlines flying from Region of Ontario to Illinois

Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Porter Airlines	PriceFrom C$ 114	Free Cancellation	Rating 8.0 430 reviews	Search Porter Airlines flights
American Airlines	PriceFrom C$ 226	Free Cancellation	Rating 7.1 11,553 reviews	Search American Airlines flights
Air Canada	PriceFrom C$ 247	Free Cancellation	Rating 7.1 10,889 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 266	Free Cancellation	Rating 7.4 9,542 reviews	Search United Airlines flights
WestJet	PriceFrom C$ 371	Free Cancellation	Rating 7.2 3,311 reviews	Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Illinois?

It is quick and easy to find Ontario to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from Ontario to Illinois with flexible booking policies on momondo?

Flights from Ontario to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ontario.

I’m not ready to book a flight from Ontario to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Popular Cities in Illinois

Flights to Fort Lauderdalefrom C$ 228

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Flights to Los Angelesfrom C$ 191

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Flights to Honolulufrom C$ 424

Flights to Phoenixfrom C$ 252

Flights to Chicagofrom C$ 217

Flights to Tampafrom C$ 256

Flights to Houstonfrom C$ 342

Cheap flights from Ontario to Illinois from C$ 170

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Illinois departing on 16/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Region of Ontario to Illinois

Our best Air Canada deals on Region of Ontario to Illinois flight tickets

United Airlines flights from Region of Ontario to Illinois

Our best United Airlines deals on Region of Ontario to Illinois flight tickets

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How to get the cheapest flight ticket from Region of Ontario to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Ontario to Illinois flight route?

How far in advance should I book a flight to Illinois?

What cabin class options are available on Ontario to Illinois flights?

Can stopping save me money on Region of Ontario to Illinois flights?

What is the cheapest airline that flies from Ontario to Illinois?

Which airlines fly to Illinois?

How many flights depart from Region of Ontario to Illinois on average per day?

How many flights depart from Region of Ontario to Illinois on average per week?

How long is the flight from Region of Ontario to Illinois?

Cheap Region of Ontario to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois

Best price found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Ontario to Illinois

Best airlines flying from Region of Ontario to Illinois

Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

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